首页 | 本学科首页   官方微博 | 高级检索  
文章检索
  按 检索   检索词:      
出版年份:   被引次数:   他引次数: 提示:输入*表示无穷大
  收费全文   19604篇
  免费   1923篇
  国内免费   1325篇
  2023年   277篇
  2022年   297篇
  2021年   396篇
  2020年   705篇
  2019年   730篇
  2018年   694篇
  2017年   794篇
  2016年   787篇
  2015年   540篇
  2014年   648篇
  2013年   2082篇
  2012年   474篇
  2011年   593篇
  2010年   459篇
  2009年   698篇
  2008年   864篇
  2007年   917篇
  2006年   879篇
  2005年   736篇
  2004年   646篇
  2003年   543篇
  2002年   510篇
  2001年   321篇
  2000年   316篇
  1999年   275篇
  1998年   222篇
  1997年   206篇
  1996年   167篇
  1995年   156篇
  1994年   161篇
  1993年   122篇
  1992年   101篇
  1991年   80篇
  1990年   76篇
  1988年   58篇
  1987年   60篇
  1986年   49篇
  1985年   402篇
  1984年   450篇
  1983年   374篇
  1982年   480篇
  1981年   471篇
  1980年   468篇
  1979年   421篇
  1978年   470篇
  1977年   398篇
  1976年   388篇
  1975年   294篇
  1974年   278篇
  1973年   236篇
排序方式: 共有10000条查询结果,搜索用时 15 毫秒
31.
记忆训练对改善少年、青年和老年人认知功能的作用   总被引:2,自引:1,他引:1  
本工作采用“位置法”(method of loci)对24例少年、24例青年和22例老年被试进行了记忆训练研究。以毕生发展的观点比较认知训练对改善不同年龄人记忆的作用,进而探讨发展的认知功能储备能量的年龄差异和训练的迁移效应。结果表明认知干预措施可在一定程度上改善老年人的记忆,同时也显示了在发展的储能和对图形的迁移效应方面,老年人明显不如青、少年,而青年与少年则彼此相近。  相似文献   
32.
谈谈个人对智力落后儿童早期干预的看法   总被引:4,自引:0,他引:4  
本文作者根据从事智力落后儿童的早期干预教学研究的实践经验对当今在我国开展早期干预的必要性以及早期干预的目的、设置的理由、内容、方式、对象、教师的条件、效果的评价以及开展的步骤等9个问题,提出了自己的看法。  相似文献   
33.
量词肯定句和否定句的理解   总被引:6,自引:2,他引:4  
缪小春  桑标 《心理学报》1992,25(3):10-17
本研究试图探索人们对舍有“所有”、“每一个”、“有一些”等量词的肯定句、否定句和双重否定句的理解。要求成人被试尽快判断呈现在计算机屏幕上的句子和哪一幅图画的内容相符。结果表明,影响反应时的因素为(1)句子的表层结构和它的底层意义的一致程度;(2)句子的意义和从图画中得出的命题的一致程度;(3)句子中使用的量词。结果还表明,否定句的判断时间不一定全都比肯定句的长。  相似文献   
34.
Eugene Ryan 《Argumentation》1992,6(3):291-296
The first part of this paper contends that argumentation is central and essential to Aristotle's Rhetoric, and recounts a number of arguments in support of that view, particularly the recognition that deliberative rhetoric or the rhetoric of counsel is the primary concern of Aristotle's work. The second part of the paper reviews the work that follows in this present volume to show that the other writers' views fit in perfectly with this thesis.  相似文献   
35.
In contrast to the opinion of numerous authors (e.g. R. Rudner, P. Kitcher, L. R. Graham, M. Dummett, N. Chomsky, R. Lewontin, etc.) it is argued here that the formation of opinion in science should be greatly insulated from political considerations. Special attention is devoted to the view that methodological standards for evaluation of scientific theories ought to vary according to the envisaged political uses of these theories.I wish to thank the Alexander von Humboldt Foundation for having supported the work on this paper.  相似文献   
36.
This study of 20 ‘white-collar’ workers aged 20–30 measured motivation, enjoyment and access to various categories of experience in both work and leisure, and examined their relationship with psychological well-being on a number of dimensions. The method used a short questionnaire, psychological scales and the innovatory ‘experience sampling methodology’ (ESM) where respondents answer questions in a diary on the receipt of a signal from a pre-programmed watch or radio pager eight times a day for 1 week. The results show, in line with other studies, that intrinsic motivation in daily life is correlated with happiness but that, not previously reported, when motivation at work is examined both extrinsic motivation and instances where a person had to do the activity but did not wish to be doing something else, i.e. ‘positive motivational change’, are correlated with positive aspects of psychological well-being, while instances where a person wanted to do the activity but wished to be doing something else, i.e. ‘negative motivational change’, correlated with negative aspects. The results also show that enjoyment in both work and leisure correlates with aspects of psychological wellbeing; and that macro ‘flow’ experiences, where high skills and high challenges are perceived as equal, are enjoyable and interesting and come primarily from work. The study also shows that categories of experience considered important for psychological well-being and deemed to come primarily from work can be obtained in leisure. The results are discussed in the context of person—situation interactions and processes, and it is advocated that these should be studied in a variety of samples.  相似文献   
37.
There has been a great deal of discussion, in this journal and others, about obstacles hindering the evolution of the philosophy of medicine. Such discussions presuppose that there is widespread agreement about what it is that constitutes the philosophy of medicine.Despite the fact that there is, and has been for decades, a great deal of literature, teaching and professional activity carried out explicitly in the name of the philosophy of medicine, this is not enough to establish that consensus exists as to the definition of the field. And even if consensus can be obtained as to what constitutes the philosophy of medicine, this does not mean that it exists as a field.  相似文献   
38.
Mary Anne Warren's claim that there is room for only one person with full and equal rights inside a single human skin ([1], p. 63) calls attention to the vast range of moral conflict engendered by assigning full basic moral rights to fetuses. Thereby, it serves as a goad to thinking about conflicts between pregnant women and their fetuses in a way that emphasizes relationships rather than rights. I sketch out what a care orientation might suggest about resolving gestational conflicts. I also argue that the care orientation, with its commitment to the significance of the partial and the particular, cannot be absorbed within standard, impartialist moral theory.  相似文献   
39.
Genetic counselors have participated in the Michigan Newborn Screening Program on a contractual basis since 1988. Their role includes newborn screening education and training, newborn nursery site visits, and monitoring newborn screening in hospitals. Their impact has been to improve the quality of newborn screening services by reducing errors and increasing completion of data fields on newborn screening cards, improving hospital nursery cooperation and problem solving, and enhancing health department response to specific problems.  相似文献   
40.
Retrospective and prospective reports of the onset of disruptive child behaviors were analyzed in a sample of clinic-referred boys. The younger boys (ages 7–9 years), compared with the older boys (ages 10–12 years), showed the highest level of disruptive behavior and, judging from mothers' reports, had the fastest progression of onsets from less serious to more serious problem behaviors. Despite some overlap, developmental sequences in problem behavior within the domains of hyperactivity/inattention, oppositional behavior, and conduct problems were similar across the two age groups. This was also the case for developmental sequences of overt or confrontive problem behaviors and covert or concealing conduct problems. Sequences of the onset of oppositional behavior and conduct problems were validated through prospective data, based on the information from mothers, teachers, and boys themselves. The implications of the findings are discussed for the formulation of developmental pathways of behavior and the analysis of causal factors.  相似文献   
设为首页 | 免责声明 | 关于勤云 | 加入收藏

Copyright©北京勤云科技发展有限公司  京ICP备09084417号